Gem-setting.



N0.717,s24. Y PATENTED JAN.6,1903.

" G. W. DOVER.

GEM SETTING.

APPLIGATION FlELED SEPT. 1'1, 1902.

N0 MODEL.

Mgr/E5555. JAM ET;

m: ucmms Pmns co. morouma. waswmmcm n c UNITED STATES PATENT Orricn.

GEORGE W. DOVER, OF GRANSTON, RHODE ISLAND.

vGiElVl-SETTlNG.

srnorrrcarron forming part of Letters Patent No. 717,824, dated January6, 1903.,

Applieation'filed September 17, 1902. Serial No. 123,673. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE W. DOVER, a citizen of the United States,residing at Crans ton, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements inGem-Settings, of which the following is a specification.

My invention relates to gem-settings, and has for its purpose animproved means for retaining the setting-prongs against expansion. Inanother application, numbered serially 123,672,1have disclosed one meansfor attai ning this end, and my present invention is designed as animprovement thereon. The par,- ticular structure therein shown isadapted exclusively for use in settings for fiat-based gems, and theprojections upon the arms of the supportingplanchet render the settingunavailable for use on some classes of jewelry.

To the ends above suggested my invention is as hereinafter set forth,and illustrated in the accompanying drawings. Figure 1 is a perspectiveview of my novel retaining-ring; Fig. 2, a transverse central section ofa setting provided with this ring; Fig. 3, a planchet adaptedto be bentup into a setting; Fig. 4, a completed setting; Fig. 5, a transversecentral section of a complete setting embodying my invention applied toa gem with a conical or pyramidal base, and Fig. 6 a detail of an unbentarm used with conical gems.

Like letters of reference indicate like parts throughout the views.

My setting is constructed as follows: A planchet B is struck or out froma sheet of metal consisting of a body portion a and radial arms I). Thelatter are provided with lateral shoulders 0, intermediate which risepoints d. On either side of the bases of the points 01 and extendinginto the shoulders are slots 0. bent inwardly parallel to each other, asshown by one of the arms in Fig. 3. The arms are then bent upwardly intofinal position. I then insert a ring A, Fig. 1, in the slots 0 of theshoulders c of the prongs and upon this .place the gem, after which thepoints d are bent over the edge of the gem.

It is evident that the so-called ring A may be polygonal as Well asannular, and its contour may contain irregularities, without departingfrom the spirit of my invention, and it is with this-interpretation thatthe word ring is employed for this member.

When a conical or pyramidal based gem is used,the planchet-arm has itsshoulders diagonally cut, asshown in Fig. 6.

Having thus described my invention, what I claim is 1. In a gem-settingthe combination with the setting-prongs-of shoulders upon the prongs,slots in said shoulders, and a ring resting in said slots.

'2. In a gem-setting the combination with the setting-prongs, ofshoulders upon the prongs, slots in said shoulders, 21. ring resting Theshoulders c of each arm are next

